Archelosauria

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Archelosauria
Proganochelys Quenstedti.jpg
Proganochelys quenstedti
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Sauria
Clade: Archelosauria
Crawford et al., 2014
Extant Subclades

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Archelosauria is a clade proposed in 2014[1] for the grouping of turtles and archosaurs (birds and crocodilians) and their fossil relatives. There were about 1000 ultra-conserved elements in their genome that are unique to turtles and archosaurs, but are not found in lepidosaurs (tuatara, lizards and snakes).[2] Other genome-wide analysis also supports this grouping.[3][4]

Classification

Archelosauria is a group used to unite archosaurs with turtles. It was found that Archelosauria was grouped within Sauria, as the sister branch to lizards and Sphenodon. Below is the phylogeny from Crawford et al., showing interrelationships of Testudines at family level down to Durocryptodira.[1]

Sauria
Lepidosauria

Sphenodon


Squamata

Anolis



Python




Archelosauria
Archosauria

Gallus



Crocodylus



Testudines
Pleurodira

Chelidae


Pelomedusoides

Pelomedusidae



Podocnemididae




Cryptodira
Trionychia

Carettochelys



Trionychidae




Durocryptodira






See also

Ankylopoda, an alternative clade that places turtles as sister taxon to lepidosaurs.

References

  1. 1.0 1.1 Crawford, Nicholas G., et al. "A phylogenomic analysis of turtles." Molecular phylogenetics and evolution (2014).
  2. Crawford, Nicholas G., et al. "More than 1000 ultraconserved elements provide evidence that turtles are the sister group of archosaurs." Biology letters 8.5 (2012): 783-786.
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